Can definitely second this. I know dark mode is hip and all that atm, but it does not play well with (my) astigmatism. At least go for one of those dark or medium grey ish color schemes.
It's not about what is hip, it's about what is most comfortable. For me, light themes feel like they induce more eye strain. But if a light theme works better for you, then go for it and ignore anyone who judges you for preferring it.
Also, whether the theme is light or dark, I would try playing with different contrast levels. Like in a light theme, black on off-white will reduce the amount of overall light being blasted at you and look much more like the page of a book. Or for a dark theme, making the background slightly lighter and the text slightly darker should reduce haloing around the letters.
